android 原生GET和POST提交数据
16lz
2021-01-26
package com.example.get;import java.io.ByteArrayOutputStream;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.io.Reader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.net.URLEncoder;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity { Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { if (msg.what == 0) { Toast.makeText(MainActivity.this, "服务器异常", 0).show(); } else if (msg.what == 1) { Toast.makeText(MainActivity.this, msg.obj.toString(), 0).show(); } }; }; private String password; private String name; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void doLogin(View v) { EditText etName = (EditText) findViewById(R.id.et_name); EditText etPwd = (EditText) findViewById(R.id.et_password); name = etName.getText().toString(); password = etPwd.getText().toString(); fetch(); } public void doLoginForPost(View v) { EditText etName = (EditText) findViewById(R.id.et_name); EditText etPwd = (EditText) findViewById(R.id.et_password); name = etName.getText().toString(); password = etPwd.getText().toString(); fetchPost(); } public void fetch() { Thread t = new Thread() { @Override public void run() { super.run(); String path = "http://192.168.1.105:8080/android/AndroidServlet?username=" + URLEncoder.encode(name) + "&password=" + URLEncoder.encode(password); try { URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setRequestMethod("GET"); conn.setReadTimeout(5000); conn.setConnectTimeout(5000); if (conn.getResponseCode() == 200) { InputStream is = conn.getInputStream(); byte[] b = new byte[1024]; int len = 0; // 创建字节数组输出流,读取输入流的文本数据时,同步把数据写入数组输出流 ByteArrayOutputStream bos = new ByteArrayOutputStream(); while ((len = is.read(b)) != -1) { bos.write(b, 0, len); } // 把字节数组输出流的数据转换成字节数组 String text = new String(bos.toByteArray(), "utf-8"); Message msg = new Message(); msg.what = 1; msg.obj = text; handler.sendMessage(msg); } else { handler.sendEmptyMessage(0); } } catch (Exception e) { e.printStackTrace(); } } }; t.start(); } public void fetchPost() { Thread t = new Thread() { @Override public void run() { super.run(); String path = "http://192.168.1.105:8080/android/AndroidServlet"; try { URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setRequestMethod("POST"); conn.setReadTimeout(5000); conn.setConnectTimeout(5000); String params = "username=" + URLEncoder.encode(name) + "&password=" + URLEncoder.encode(password); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("Content-Length", params.length() + ""); // 设置打开输出流 conn.setDoOutput(true); // 拿到输出流 OutputStream os = conn.getOutputStream(); os.write(params.getBytes()); os.flush(); if (conn.getResponseCode() == 200) { InputStream is = conn.getInputStream(); byte[] b = new byte[1024]; int len = 0; // 创建字节数组输出流,读取输入流的文本数据时,同步把数据写入数组输出流 ByteArrayOutputStream bos = new ByteArrayOutputStream(); while ((len = is.read(b)) != -1) { bos.write(b, 0, len); } // 把字节数组输出流的数据转换成字节数组 String text = new String(bos.toByteArray(), "utf-8"); Message msg = new Message(); msg.what = 1; msg.obj = text; handler.sendMessage(msg); } else { handler.sendEmptyMessage(0); } } catch (Exception e) { e.printStackTrace(); } } }; t.start(); }}更多相关文章
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